They also have a promo code BLKF40 for 40% off of extra keypads and freeze sensors. I'm not sure if you can stack both CYBMON and BLKF40.
I wrote a SimpliSafe DIY Home Alarm System Review about a year ago. Since we bought the system the glitches we originally had stopped and the system has worked fine. I think we had a dead battery in one unit but that was about all. Also they have since added monitors for fire alarm and carbon monoxide as well.
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